Hi,. I've on birth control pill for 3 months. It's a 21 day pill. Ever since i started the pill my period was so light and sometimes it last for 3 days. Before i took the pills i was a normal-heavy period and never skip a period even for single month. I started Diane 35 on january first day of my period. On february while on 7 days no pill, i had a very light period, brown to pinkish and lasted for 3 days. Then on march same thing till april a very light period every 7 days no pill. I remember april was super light period. I supposed to have a period on May 12 but until it's been 7 days delayed. I remembered i misses 1 pill last month but took it right away the next day together with my daily dose. On May 12 when supposed to have my period I felt breast tenderness and lasted for only 3 days and then back to normal. I thought my period was about to come but until now I'm 7 days delayed. Please any advice what's happening on me?